US5423924A - Method for the heat treatment of at least one metal wire with heat-transfer plates - Google Patents

Method for the heat treatment of at least one metal wire with heat-transfer plates Download PDF

Info

Publication number
US5423924A
US5423924A US07/555,942 US55594290A US5423924A US 5423924 A US5423924 A US 5423924A US 55594290 A US55594290 A US 55594290A US 5423924 A US5423924 A US 5423924A
Authority
US
United States
Prior art keywords
wire
plates
temperature
grooves
pearlitization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/555,942
Other languages
English (en)
Inventor
Andre Reiniche
Christian Chanet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Generale des Etablissements Michelin SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN-MICHELIN & CIE reassignment COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN-MICHELIN & CIE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CHANET, CHRISTIAN, REINICHE, ANDRE
Priority to US08/283,278 priority Critical patent/US5433420A/en
Application granted granted Critical
Publication of US5423924A publication Critical patent/US5423924A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/64—Patenting furnaces

Definitions

  • the present invention relates to methods and devices which make it possible to heat-treat metal wires, particularly carbon-steel wires, for instance for the purpose of obtaining a fine pearlitic structure. These wires are used, in particular, to reinforce rubber and/or plastic articles, for instance automobile tires.
  • French Patent Application 88/00904 describes a method and a device for effecting a pearlitization treatment in which the wire is passed within one or more tubes containing a gas which is practically without forced ventilation. That method and device have the following advantages:
  • a pearlitization treatment can be carried out with the same installation on wires whose diameter varies within wide limits;
  • incubation times which vary within ratios of 1 to 1.7, the incubation time being the time elapsing between the start of the cooling and the start of the austenite/pearlite transformation, this making it necessary to use installations having different construction parameters in order to treat steel wires of the same diameter and identical or similar compositions in order to obtain an optimal steel structure in all cases.
  • the object of the invention is to propose a method and a device for thermally treating a metal wire which is of good adaptability; adaptability can be defined, in particular, as the ability to obtain identical time-temperature curves for wires of the same diameter having different TTT curves.
  • the flow of heat exchanged by the wire is substantially controlled by the thermal conductivity and the dimensions of the ring of gas surrounding the wire to be treated.
  • the present invention makes it possible to obtain the adaptability by modifying and/or regulating the dimensions of said gaseous ring.
  • the method of the invention for the thermal treatment of at least one metal wire is characterized by the following features:
  • the wire is passed within at least one pair of thermal transfer plates between two grooves provided on the two plates of each of these pairs, the distance between the plates being variable, and the wire being directly in contact with a gas which is practically without forced ventilation, disposed between the grooves;
  • the invention also concerns a device for the heat treatment of at least one metal wire, the device being characterized by the following features:
  • each plate has a groove so as to form two grooves facing each other between which the wire passes; the wire is directly in contact with a gas which is practically without forced ventilation and is disposed between the grooves;
  • the invention also concerns the methods and complete installations for the treatment of wires employing the method and the device previously described.
  • the invention also concerns the metal wires obtained by the methods and/or with the device and installations in accordance with the invention.
  • FIG. 1 is a plan view of an installation for thermally treating a plurality of metal wires, this installation using several devices in accordance with the invention
  • FIG. 2 shows a part of one of the devices used in the installation shown in FIG. 1, FIG. 2 being a section taken in a plane perpendicular to the longitudinal direction of the wires;
  • FIGS. 3 and 4 show different shapes of grooves of the device shown in FIG. 2, FIGS. 3 and 4 being sections taken in the same manner as FIG. 2;
  • FIG. 5 is a view showing the passages on a side of a plate for the flow of a heat-exchange fluid used in the device shown in FIG. 2;
  • FIG. 6 is a chart which shows the change in temperature as a function of time for a wire treated in the installation shown in FIG. 1;
  • FIG. 7 shows another device according to the invention, in section along a plane perpendicular to the longitudinal direction of the wire treated in this device.
  • FIG. 8 shows in section a portion of the fine pearlitic structure of a wire treated in the installation shown in FIG. 1.
  • FIG. 1 shows a complete installation for the treating of carbon-steel wires so as to obtain a fine pearlitic structure.
  • This installation 1000 which permits, for example, the simultaneous treatment of eight wires 1, has four zones marked Z 1 , Z 2 , Z 3 , Z 4 , the wires 1 passing in succession through these four zones in that order.
  • Zone Z 1 corresponds to an austenitization treatment.
  • the wires 1 are heated to a temperature above the AC3 transformation temperature in order to obtain a homogeneous austenite.
  • Zone Z 2 corresponds to a rapid cooling which makes it possible to bring the wires 1 to a temperature below the AC1 transformation temperature, so as to obtain a metastable austenite.
  • Zone Z 3 corresponds to the pearlitization treatment, with transformation of metastable austenite into pearlite.
  • Zone Z 4 corresponds to a cooling of the wires in order to bring them to ambient temperature or to a temperature close to ambient temperature.
  • the austenitization treatment in zone Z 1 is carried out in known manner, for instance with a muffle furnace or gas furnace or in accordance with French Patent Application 88/08425, this method consisting in heating the wires by passing them within tubes containing a gas which is practically free of forced ventilation.
  • Each of the zones Z 2 , Z 3 , and Z 4 has at least one device in accordance with the invention. Such a device is shown in part in FIG. 2.
  • This device 100 has a pair of thermal transfer plates 2, the wires 1 passing within this pair.
  • the heat conductive plates 2 are made, for instance, of bronze, steel or cast iron.
  • FIG. 2 is a section taken along a plane perpendicular to the longitudinal direction of the wires 1, which are all parallel to each other.
  • the two plates 2 are parallel to each other and arranged one above the other, the upper plate being designated 2a and the lower plate being designated 2b.
  • the plates 2a, 2b are separated by the distance E which may be varied by at least three screws 3, for instance four screws; for simplicity in the drawing only a single one of these screws has been shown in FIG. 2.
  • the movement of rotation of each screw 3 can be synchronized by means of the toothed wheel 4 forming an extension of the screw 3, and the chain 5.
  • the screw 3 is in engagement with a thread 6 developed in the upper transfer plate 2a and rests against a ball stop or a bronze bearing 7 placed in the lower transfer plate 2b.
  • the other screws have identical arrangements, the chain 5 connecting all the wheels 4 together to assure the synchronization of the displacements and therefore the parallelism of the plates, that is to say the same value of the distance E along the plates 2.
  • Each plate 2a, 2b has grooves 8, one for each wire.
  • Each groove 8a of the plate 2a faces a groove 8b of the plate 2b.
  • the shape of the grooves is, for instance, the same for plates 2a, 2b.
  • each of the grooves 8 has the shape of a half-cylinder of revolution the axis of which is parallel to the longitudinal direction of the wires 1, the grooves 8 therefore having the shape of a half-circle in a section perpendicular to the longitudinal direction of the wires, that is to say in the section of FIG. 2.
  • Each wire 1 passes between two grooves 8a, 8b which face each other. These grooves are so provided that the wire 1 can pass between these grooves when they are in contact with each other, that is to say, Di>Dr, Df being the diameter of the wire 1.
  • the means which make it possible to advance each wire 1 between the plates 2 comprise, for instance, the reel 9 arranged beyond the zone Z 4 .
  • the wires 1 are wound on the reel after the treatment, the reel 9 being driven by the motor 10 (FIG. 1).
  • the wires 1 are directly in contact with a gas 11 which fills the grooves 8 and is practically without forced ventilation, this gas 11 being in communication with the chamber 12, outside the plates 2, this chamber 12 being defined within the enclosure 13.
  • the gas 11 is, for instance, hydrogen, nitrogen, helium, a mixture of hydrogen and nitrogen, of hydrogen and methane, of nitrogen and methane, of helium and methane or of hydrogen, nitrogen and methane.
  • FIG. 3 shows two grooves 8a, 8b facing each other each of which has the form of a circular arc less than half a circle
  • FIG. 4 shows two grooves 8a, 8b facing each other, each of which has the shape of half a square.
  • Equation (2) is always true, that is to say, for instance, in the case of FIG. 4, one has ##EQU7## d being the length of the side of the square.
  • each plate 2 On the side opposite the wires 1, each plate 2 is in contact with a space 15 in which a heat-exchange fluid 16, for instance water, flows.
  • a heat-exchange fluid for instance water
  • the plates 2 are extended into the spaces 15 by fins 17 which facilitate the heat exchanges between the plates 2 and the fluid 16.
  • each plate 2 there is preferably used a number of fins 17 which is equal to the number of wires 1 treated, and these fins 17 are arranged along the axis of the wires 1 (FIG. 2), a fin 17a of the plate 2a being located practically in the same plane as a fin 17b of the plate 2b, the axis of a wire 1 being arranged in this plane.
  • the space 15 is closed by the cover 18, tightness being assured by the joint 23.
  • FIG. 5 shows a space 15, the cover 18 being removed.
  • the fluid 16 arrives through the conduit 19 and then flows along the fins 17.
  • Deflector walls 20 cause changes in direction upon this flow, indicated diagrammatically by the arrows F16 in FIG. 5.
  • the fluid 16 then emerges from the device 100 through the conduit 21.
  • the device 100 has electric resistors 22 arranged in the plates 2, making it possible to heat the plates 2 if so desired.
  • the fluid 16 is preferably not circulated, since the fluid serves to evacuate the heat coming from the wires 1 towards the outside.
  • a flow of fluid 16 can be traced in FIG. 5 for a single one of the plates 2.
  • FIG. 6 shows the treatment diagram ⁇ of a wire 1 upon its passage through the zones Z 2 to Z 4 of the installation 1000, the abscissa axis representing the time t and the ordinate axis representing the temperature T of the wire 1.
  • the time origin corresponds to the point A, which corresponds to the outlet of the zone Z 1 , the wire 1 at the temperature T A having a homogenous austenite structure.
  • the portion AB of the diagram corresponds to the rapid cooling in the zone Z 2 in order to obtain a metastable austenite, the wire having the temperature T B at the end of this cooling.
  • the portion BC of the diagram corresponds to the zone Z 3 where the pearlitization of the wire 1 is effected.
  • the temperature of the wire 1 preferably remains as close as possible to T B in this zone Z 3 , the variation in temperature being at most equal to 10° C. plus or minus this temperature T B , and preferably at most equal to 5° C. plus or minus T B , in order to avoid or eliminate recalescence phenomena.
  • the portion BC is shown in the form of a straight segment corresponding to the temperature T B .
  • the portion CD of the diagram corresponds to the cooling of the wire in order to bring it to ambient temperature or to a temperature close to ambient temperature after pearlitization, this final temperature being marked T D .
  • the device or devices 100 used for the zone Z 2 satisfy the relationship:
  • the devices 100 used for the zone Z 3 satisfy the relationship:
  • austenite into pearlite is very exothermal and the region where the rate of pearlitization is maximum corresponds to a region where the evacuation of the heat must be maximum. In the other regions, the evacuation of the heat need be less, or it may even be necessary to add heat. In order to effect this modulation, one can regulate, for instance, three factors:
  • N of devices 100 used in the zone Z 3 there are N-2 ideal configurations possible in which the maximum rate of transformation of austenite into pearlite is in the middle of one of these devices.
  • the adjustment of the devices 100 of the zone Z 3 is obtained, for instance, by means of a computer in the following manner:
  • the temperatures of the wires 1 is determined at the outlet of the plates 2 by a pyrometer which supplies this information to the computer. The latter then sends signals to valves which control the flow of fluid 16, to valves which permit expelling this fluid (in the case of heating), for instance with compressed air, to motors acting on the wheels 4, and to temperature regulators acting on the electric resistors 22.
  • the rate of passage of the wire is 1 meter per second and the eight wires are treated simultaneously.
  • the austenitization produced in the zone Z 1 is effected in conventional manner, for instance with a gas or muffle oven, so as to obtain an austenitization temperature T A of 980° C.
  • the diameter of the wire is 1.3 mm, the gas 11 is cracked ammonia containing 75% by volume H 2 and 25% by volume N 2 , the conductivity ⁇ at 600° C. being 0.28 watts.m -1 .°K -1 .
  • the zones Z 2 to Z 4 of the installation 1000 comprise a total of eight devices 100.
  • the grooves 8 have the shape of half-circles in section, as previously described.
  • the zone Z 2 has a device 100 of a length of 2.7 m. Diameter of the grooves 8: 3.7 mm.
  • the zone Z 4 has a device 100 of a length of 2.5 m. Diameter of the grooves 8: 3.7 mm.
  • the zone Z 3 has six devices 100. Each of these elements has a length of 1 m and is equipped with electric resistors of a total power of 1.5 kW. There are therefore four ideal configurations, as previously indicated.
  • the total length is therefore 6 meters and the time of passage of the wires is six seconds.
  • the diameter of the grooves 8 is 3.2 mm.
  • Steel wires 1 are used having 0.815% C, 0.527% Mn, 0.219% Si, 0.006% S, 0.012% P, 0.082% Al, 0.045% Ca, 0.020% Cr, 0.008% Ni.
  • the time corresponding to the passage in the zone Z 2 is 2.7 seconds.
  • the temperature of the wires 1 in the zone Z 3 is 580° ⁇ 10° C.
  • a configuration of type 1 (Table 1) is noted.
  • the value of the coefficient K is: in the zone Z 2 : 6.31; in The zone Z 3 : 5.44; in the zone Z 4 : 6.31.
  • the wires 1 After treatment in the installation 1000, the wires 1 have a tensile strength of 1350 MPa. These wires are brass coated and drawn in known manner in order to obtain a final diameter of 0.2 mm, the tensile strength of the drawn wires being 3480 MPa.
  • the zones Z 2 to Z 4 of the installation 1000 comprise a total of ten devices 100.
  • the grooves 8 have the shape in cross section of half circles, as previously described.
  • the zone Z 2 has a device 100 of a length of 2.7 m. Diameter of the grooves: 3.7 mm.
  • the zone Z 4 has a device 100 of a length of 2.5 m. Diameter of the grooves 8: 3.7 mm.
  • the zone Z 3 has eight devices 100, which therefore corresponds to six possible ideal configurations. Each device 100 has a length of 0.75 m. The length and the time of stay of the wires 1 in this zone Z 3 are therefore identical to Example 1. Diameter of the grooves: 3.2 mm.
  • the other characteristics of the devices 100 are identical to those of Example 1, in particular the nature of the gas 11.
  • the wires 1 are made with the same steel as in Example 1.
  • the temperature of the wires 1 in the zone Z 3 is 550° ⁇ 5° C., that is to say, the isothermicity is better than in Example 1. This better isothermicity has made it possible to lower the temperature in the zone Z 3 without the danger of the formation of bainite, which makes it possible to improve the mechanical properties and the value in use of the wires 1.
  • the power peak of the transformation of austenite into pearlite is present in the second element 100 of this zone Z 3 .
  • the coefficient K has the same values as in Example 1 in the zones Z 2 to Z 4 .
  • the distance E was constant in each device 100, but the invention applies to the case that the distance E in one and the same device varies within said device.
  • FIG. 7 shows a device 200 in accordance with the invention which has two plates 2 connected at one of their ends by a rod 30 parallel to the wire 1 which is arranged between the grooves 8.
  • the plates 2 turn around the rod 30 and therefore the distance E varies in the direction perpendicular to the wire 1.
  • the opening of the plates 2 is obtained, for instance, by means of a wedge-shaped part 31 which moves the plates apart when it is pushed between these plates.
  • the wire 1 treated in accordance with the invention has the same structure as the one obtained by the known lead patenting method, that is to say, a fine pearlitic structure.
  • This structure comprises lamellae of cementite separated by lamellae of ferrite.
  • FIG. 8 shows in cross section a portion 50 of such a fine pearlitic structure.
  • This portion 50 has two lamella of cementite 51 practically parallel to each other separated by a lamellae of ferrite 52.
  • the thickness of the cementite lamellae 51 is represented by i and the thickness of the ferrite lamellae 52 is represented by e.
  • the pearlitic structure is fine, that is to say, the average value i+e is at most equal to 1000 ⁇ , with a standard deviation of 250 ⁇ .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Tunnel Furnaces (AREA)
  • Resistance Heating (AREA)
  • Insulated Conductors (AREA)
  • Wire Processing (AREA)
US07/555,942 1989-07-26 1990-07-20 Method for the heat treatment of at least one metal wire with heat-transfer plates Expired - Fee Related US5423924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/283,278 US5433420A (en) 1989-07-26 1994-07-29 Device for the heat treatment of at least one metal wire with heat-transfer plates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8910324A FR2650296B1 (fr) 1989-07-26 1989-07-26 Procede et dispositif pour traiter thermiquement au moins un fil metallique avec des plaques de transfert thermique
FR8910324 1989-07-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US08/283,278 Division US5433420A (en) 1989-07-26 1994-07-29 Device for the heat treatment of at least one metal wire with heat-transfer plates

Publications (1)

Publication Number Publication Date
US5423924A true US5423924A (en) 1995-06-13

Family

ID=9384333

Family Applications (2)

Application Number Title Priority Date Filing Date
US07/555,942 Expired - Fee Related US5423924A (en) 1989-07-26 1990-07-20 Method for the heat treatment of at least one metal wire with heat-transfer plates
US08/283,278 Expired - Fee Related US5433420A (en) 1989-07-26 1994-07-29 Device for the heat treatment of at least one metal wire with heat-transfer plates

Family Applications After (1)

Application Number Title Priority Date Filing Date
US08/283,278 Expired - Fee Related US5433420A (en) 1989-07-26 1994-07-29 Device for the heat treatment of at least one metal wire with heat-transfer plates

Country Status (15)

Country Link
US (2) US5423924A (fr)
EP (1) EP0410300B1 (fr)
JP (1) JPH0361332A (fr)
KR (1) KR910003125A (fr)
CN (1) CN1027456C (fr)
AT (1) ATE106457T1 (fr)
AU (1) AU636631B2 (fr)
BR (1) BR9003639A (fr)
CA (1) CA2022046A1 (fr)
DE (1) DE69009328T2 (fr)
ES (1) ES2054172T3 (fr)
FR (1) FR2650296B1 (fr)
IE (1) IE71219B1 (fr)
OA (1) OA09219A (fr)
ZA (1) ZA905557B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343305A (zh) * 2013-07-15 2013-10-09 盐城市苏丰机械科技有限公司 铝合金丝加热器
KR20160124813A (ko) * 2014-02-21 2016-10-28 꽁빠니 제네날 드 에따블리세망 미쉘린 타이어용 스틸 보강 요소의 열처리 방법

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626290B1 (fr) * 1988-01-25 1990-06-01 Michelin & Cie Procedes et dispositifs permettant de traiter thermiquement des fils d'acier au carbone de facon a obtenir une structure perlitique fine
TW297158B (fr) 1994-05-27 1997-02-01 Hitachi Ltd
DE19940845C1 (de) * 1999-08-27 2000-12-21 Graf & Co Ag Verfahren und Vorrichtung zum Herstellen von Feindraht
FR3017881A1 (fr) * 2014-02-21 2015-08-28 Michelin & Cie Installation et procede de traitement thermique a haute vitesse d'un element de renfort en acier pour pneumatique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914862C (de) * 1942-12-29 1954-08-09 Hohenlimburger Walzwerke Ag Durchlaufverfahren und Vorrichtung zum Haerten, Vergueten und Biegen von Profilstaeben
DE2055964A1 (de) * 1969-11-15 1971-06-24 Kobe Steel Ltd Verfahren und Vorrichtung zur konti nuierhchen Wärmebehandlung, insbesondere fur reaktive Metalle
DE2111631A1 (de) * 1970-03-13 1972-03-30 Pirelli Vorrichtung zum Haerten von Stahldraht
FR2359209A1 (fr) * 1976-07-21 1978-02-17 Michalke Fa Ernst Dispositif pour le traitement thermique de fils en circulation
US4581512A (en) * 1984-07-10 1986-04-08 Mg Industries, Inc. Method and apparatus for cooling induction heated material
US4983227A (en) * 1988-01-25 1991-01-08 Compagnie Generale Des Etablissements Michelin-Michelin & Cie Process and apparatus for heat-treating carbon steel wires to obtain a fine pearlitic structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607519B1 (fr) * 1986-11-27 1989-02-17 Michelin & Cie Procede et dispositif pour traiter thermiquement un fil d'acier
FR2632973B1 (fr) * 1988-06-21 1993-01-15 Michelin & Cie Procedes et dispositifs pour obtenir une structure d'austenite homogene
FR2652094B1 (fr) * 1989-09-19 1993-07-30 Michelin & Cie Procedes et dispositifs permettant de traiter thermiquement des fils metalliques en les faisant passer sur des cabestans.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914862C (de) * 1942-12-29 1954-08-09 Hohenlimburger Walzwerke Ag Durchlaufverfahren und Vorrichtung zum Haerten, Vergueten und Biegen von Profilstaeben
DE2055964A1 (de) * 1969-11-15 1971-06-24 Kobe Steel Ltd Verfahren und Vorrichtung zur konti nuierhchen Wärmebehandlung, insbesondere fur reaktive Metalle
US3752458A (en) * 1969-11-15 1973-08-14 Kobe Steel Ltd Continuous heat treatment method and apparatus mainly for reactive metals
DE2111631A1 (de) * 1970-03-13 1972-03-30 Pirelli Vorrichtung zum Haerten von Stahldraht
FR2359209A1 (fr) * 1976-07-21 1978-02-17 Michalke Fa Ernst Dispositif pour le traitement thermique de fils en circulation
US4581512A (en) * 1984-07-10 1986-04-08 Mg Industries, Inc. Method and apparatus for cooling induction heated material
US4983227A (en) * 1988-01-25 1991-01-08 Compagnie Generale Des Etablissements Michelin-Michelin & Cie Process and apparatus for heat-treating carbon steel wires to obtain a fine pearlitic structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103343305A (zh) * 2013-07-15 2013-10-09 盐城市苏丰机械科技有限公司 铝合金丝加热器
KR20160124813A (ko) * 2014-02-21 2016-10-28 꽁빠니 제네날 드 에따블리세망 미쉘린 타이어용 스틸 보강 요소의 열처리 방법
US20170051375A1 (en) * 2014-02-21 2017-02-23 Compagnie Generale Des Etablissements Michelin Method For The Heat Treatment Of A Steel Reinforcement Element For Tires
US11021770B2 (en) * 2014-02-21 2021-06-01 Compagnie Generale Des Etablissements Michelin Method for the heat treatment of a steel reinforcement element for tires

Also Published As

Publication number Publication date
JPH0361332A (ja) 1991-03-18
ZA905557B (en) 1992-05-27
ATE106457T1 (de) 1994-06-15
CN1027456C (zh) 1995-01-18
EP0410300A1 (fr) 1991-01-30
IE71219B1 (en) 1997-02-12
KR910003125A (ko) 1991-02-26
OA09219A (fr) 1992-06-30
ES2054172T3 (es) 1994-08-01
AU636631B2 (en) 1993-05-06
EP0410300B1 (fr) 1994-06-01
DE69009328D1 (de) 1994-07-07
CN1049868A (zh) 1991-03-13
FR2650296B1 (fr) 1991-10-11
CA2022046A1 (fr) 1991-01-27
BR9003639A (pt) 1991-08-27
AU5977790A (en) 1991-01-31
US5433420A (en) 1995-07-18
DE69009328T2 (de) 1994-09-29
FR2650296A1 (fr) 1991-02-01

Similar Documents

Publication Publication Date Title
US4983227A (en) Process and apparatus for heat-treating carbon steel wires to obtain a fine pearlitic structure
US5423924A (en) Method for the heat treatment of at least one metal wire with heat-transfer plates
US3496033A (en) Method and apparatus for controlling annealing furnaces
US4040872A (en) Process for strengthening of carbon steels
US4830684A (en) Process for heat treating a carbon steel wire
US2428303A (en) Induction heating means for gear teeth
US2965368A (en) Wire treating apparatus
US5032191A (en) Methods and devices for obtaining a homogeneous austenite structure
JPS5723026A (en) Spheroidization treatment for bar steel material
CN103572018A (zh) 钢构件的淬火方法
US5251881A (en) Methods and devices for the thermal treatment of metal wires upon passing them over capstans
US5089059A (en) Method and device for the heat treatment of metal straps
US4621794A (en) Apparatus for producing a grain-oriented electromagnetic steel strip or sheet
SE8403928L (sv) Vermebehandlingsforfarande for en rorledning
US7011720B2 (en) Double-taper steel wire and continuous heat treating method and device therefor
RU2116849C1 (ru) Участок охлаждения катанки
KR100340508B1 (ko) 모델을이용한페라이트계스테인레스열연코일의상소둔방법
CN113718099B (zh) 一种耐热钢丝的热处理装置
CA1274157A (fr) Methode et installation de recuit continu pour l'acier a faible teneur de carbone allant a l'emboutissage
JPS5830938B2 (ja) 高加工度冷間引抜き用高炭素鋼線材の連続熱処理方法
CN106350640A (zh) 一种对冷轧带钢进行连续淬火的方法
JPH0437881Y2 (fr)
JPS5946292B2 (ja) 連続焼鈍炉用冷却装置
SU378445A1 (ru) Способ термомеханической поверхностной обработки
TH6036B (th) กรรมวิธีและเครื่องมือสำหรับการดำเนินการด้วยความร้อนต่อลวดเหล็กกล้าคาร์บอนเพื่อให้ได้โครงสร้างเทอร์ไลทิกที่ละเอียด

Legal Events

Date Code Title Description
AS Assignment

Owner name: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN-MIC

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:REINICHE, ANDRE;CHANET, CHRISTIAN;REEL/FRAME:005402/0426

Effective date: 19900717

CC Certificate of correction
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20070613